Implement the Vue version of the app

app.js

@@ -0,0 +1,55 @@
+const app = new Vue({
+	el: `#app`,
+	data: {
+		options: [],
+		chosen: null,
+	},
+	computed: {
+		totalWeight() {
+			return this.options
+				.filter(c => {
+					try { parseInt(c.weight) }
+					catch (e) { return false };
+					return true;
+				})
+				.reduce(
+					(p, c) => p + parseInt(c.weight),
+					0
+				);
+		},
+	},
+	methods: {
+		addOption() {
+			this.options.push({
+				name: ``,
+				weight: ``,
+				chance: ``,
+			});
+		},
+		removeOption(i) {
+			this.options.splice(i, 1);
+			this.updateChanceValues();
+		},
+		pickAnOption() {
+			let choice = Math.floor(Math.random() * this.totalWeight);
+
+			let min = 0;
+			for (const opt of this.options) {
+				let max = min + parseInt(opt.weight);
+				if (choice < max) {
+					this.chosen = opt;
+					return;
+				};
+				min = max;
+			};
+		},
+		updateChanceValues() {
+			for (const opt of this.options) {
+				if (!opt.weight) {
+					continue
+				}
+				opt.chance = Math.round(opt.weight / this.totalWeight * 100 );
+			};
+		},
+	},
+})